adult
analysis
antibodies
arm
blood
blue
care
caucasian
clinic
closeup
cutout
doctor
donation
dose
draw
female
flu
glove
hand
health
hold
hospital
illness
immunity
influenza
injecting
injection
isolated
medical
medicine
needle
nurse
patient
people
person
pharmaceutical
polio
protection
shoulder
sterile
syringe
technology
tetanus
tuberculosis
vaccine
veins
white
women
worker